Avoid absoluteImageURL() creating data URLs for canvas by default.

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index 8a6d06f5136d659721de230a5aa6547202e5e9c6..508356b5c3f3f821e10bea7b7634887cc48eed55 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -3259,7 +3259,7 @@ void WebViewImpl::copyImageAt(const WebPoint& point)
 
     HitTestResult result = hitTestResultForWindowPos(point);
 
-    if (result.absoluteImageURL().isEmpty()) {
+    if (result.absoluteImageURLIncludingCanvasDataURL().isEmpty()) {
         // There isn't actually an image at these coordinates.  Might be because
         // the window scrolled while the context menu was open or because the page
         // changed itself between when we thought there was an image here and when
@@ -3278,7 +3278,7 @@ void WebViewImpl::saveImageAt(const WebPoint& point)
     if (!m_page)
         return;
 
-    KURL url = hitTestResultForWindowPos(point).absoluteImageURL();
+    KURL url = hitTestResultForWindowPos(point).absoluteImageURLIncludingCanvasDataURL();
 
     if (url.isEmpty())
         return;